music-assistant server up to 2.9.8 OAuth Callback oauth_callback.html WebserverController._handle_auth_callback return_url cross site scripting

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.9$0-$5k3.18

Summaryinfo

A vulnerability described as problematic has been identified in music-assistant server up to 2.9.8. This issue affects the function WebserverController._handle_auth_callback of the file oauth_callback.html of the component OAuth Callback Handler. Such manipulation of the argument return_url leads to cross site scripting. This vulnerability is documented as CVE-2026-49154. The attack can be executed remotely. Additionally, an exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in music-assistant server up to 2.9.8. It has been rated as problematic. Affected by this issue is the function WebserverController._handle_auth_callback of the file oauth_callback.html of the component OAuth Callback Handler. The manipulation of the argument return_url with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-49154. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details as well as a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1059.007.

The exploit is available at github.com. It is declared as proof-of-concept. By approaching the search of inurl:oauth_callback.html it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 2.9.9 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 3.9

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Google Hack: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: server 2.9.9

Timelineinfo

10/20/2026 Advisory disclosed
10/20/2026 +0 days VulDB entry created
10/20/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-5fch-fp25-3g2p
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2026-49154 (🔒)
GCVE (CVE): GCVE-0-2026-49154
GCVE (VulDB): GCVE-100-422756
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 10/20/2026 13:03
Changes: 10/20/2026 13:03 (60)
Complete: 🔍
Submitter: ZAST.AI
Cache ID: 216::103

Submitinfo

Accepted

Once again VulDB remains the best source for vulnerability data.

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